If you don't already have a 50 amp outlet ready for the trailer, here is how to wire one.
https://www.myrv.us/electric/
If you do have an outlet there, use the above to make sure it is wired correctly. 50 amp service is just like a house service. It is 120/240 vac with two hots, a neutral, and a ground. The trailer will have 240 vac power to it, but it only uses the individual 120 vac hot legs independently. Nothing in the trailer uses 240 vac. But there have been too many instances of someone wiring up their outlet wrong and getting 240 vac to things it shouldn't, and causing significant damage.